Transmission lock



C.- L.'JOHNSON.

TRANSMISSION LOCK. APPLICATLON men own, 1920.

Patented Mar. 7, 1922. 2 SHEET S-SHEET C.- L. JOHNSON.

TRANSMISSION LOCK MPLICATXON FILED 050.17, 1920.

Patented Mar. 7, 1922.

2 SHEETS-SHEET 2- \E III... .i

ai OZ HH M l wwy aw a 6. J

i v 6 g "wardly and afford concave guide surtion of the lever engages in the notes ll of p facesli.

Slidably mounted on the tall 14: the teeth 16 and a shoulder 18 of the lever,

a supporting collar or centrally apertured block 19. Pivotally attached in notches of the collar 19v are the upper ends ing 5.

of two oppositely positioned latches or loclc ing arms 20, the lower ends which have integrally formed thereon loclnng heads or projections 21. he inner or rear surfaces 22 of the locking latches 20 are curved for co-action with the our ed surfaces 17 of the teeth 16.

Rigidly secured or integrally connected to the collar 19 is the lower end of a longupwardly extending rod or bar 23, which is slidably disposed with longitudinal groove or slot 24, provided in one side of the gear shift leverj13 and its tail let. The upper end of the bar 23has a slotted headm25.

formed thereon which is disposed within a chamber or opening 26 formed withinthe gear shift lever 13 above the supporting cas- Mounted within the lever-chamber 26 is a pin lock 27,. the barrel 28. of which is provided with an eccentric pin 29 which projects into the slot of the head 25 formed on the upper end of the bar 23'.

The operation is as follows:

In the neutral vertical position of the gear shift lever 13, the tail piece 14L projects downwardly so that the head 15 thereof engages in the notch 11 of the housing'partition wall 10, as shown in Figures t and 5 To shift the gears of the transmissiona composite movement of the gear shift lever 13 is necessary, that is,the lever must be thrown to one side and either forwardly or rearwardly to permit the lever tail head 15 to move out of the artition wall notch 11 and intothe notch l of one. of the gear. shift blocks 3 to'cause shifting of the gears.

In the unleclred position of the gear shift lever 13 the pin 29 of the pin loclr'27 is .t uppermost position holding the latch H Li 23 and the. collar 19. elevated with the P pivoted latchesf20 hanging in. release posi tion as shown in Figure t out of engagement with the teeth 16 To look the gear shift lever 13 against moi-*einentfthe lever is first moved intovertical neutral position. A key is then inserted in the hey slot of the pin lock-27 and the barrel 28 is rotated to cause the pin29 to move in the slotted head 25,

between gagement with the casing flanges 9.

movement, thereby preventing theft of an automobile equipped with the improved lock, and also preventing interference with the automobile gear shift mechanisms oy unauthorized persons.

To unloclr the device it is only'necessary to insert the lrey in the key slot of the lock 27, and by turning the barrel. 28 the look pin 29 acts to draw the latch bar 23 and the collar 19 upwardly into release. position.

Upward movement of the. collar 19 carries the pivoted latches 2O upwardly out of en- 7 In the release position of the latches'20 they clear the teeth 16 and fall by gravity against the sides of the tail piece i l of the gear shift lever.

I am aware that numerous details of con struction may be varied through a wide range without departing from the principles ofthis invention, andli therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

r I claimas my invention:

V 1. In a gear shift. leverlock of the class described the combination. with a gear shift lever, of locking means therein, pivoted locking members slidably supported onthe leverand actuable by said lockin'g means,

by said locking latches to hold the gear shift lever locked against movement.

3. Ina device. of theclass described the combination with a gear shiftlever, of a collar slidably engaged Fthereon, means for supporting said lever, flanges formed there in. on opposite sides of the lever, projections integrally formed.- on said lever, latching 'members movablv attached to said collar,

and key operated means within said lever andconnected with said collar to move the same'downwardly to cause the latching Inem bersto contact and slideoutwardly. on the lever projections into locking engagement with said flanges. i i

4C. In a gear shift lever lock the combination with gearshift lever, of means slid ably mounted thereon, and locking members pivotally attached to said means.

5. In a gear shift lever lockthe combina- .tion with a gear shift lever, of projections integrally formed thereon, means slidably engaged on said lever above said projections and locking members pivotally connected with said means and adapted to slide outwardly on Said projections into locking position when said means is lowered.

6. In a gear shift lever lock the combination with a gear shift lever, of projections formed on opposite sides thereof, a collar slidably engaged on said lever above said projections, means on said lever for actuating said collar, and locking members pivoted on said collar and adapted to con tact said projections and swing outwardly into locking position when said collar is lowered by said means.

7. The combination with a ball gear shift lever, of a casing having a socket therein for receiving the ball portion of said lever, flanges formed in said casing on opposite sides of the lever, pivoted locking members mounted on the lower end of said lever within said casing, projections formed on opposite sides of the lower end of said lever, and key operated means within said lever adapted to lower said locking members into engagement with said projections to cause outward swinging of said locking members into locking engagement with, the casing flanges to hold the lever locked against movement in neutral position.

8. In a gear shift lever lock the combination with a pair of stationary plates, of a gear shift lever projecting therebetween amember slidahly mounted on said lever,

latches pivoted. thereon, and means on said lever for moving said latches into locking en gagement with said stationary plates when said member is lowered on said lever.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

GOLVIN L. JOHNSON.

lVitnesses EARL M. HARDINE, CARLTON HILL. 

